/// <summary>
/// Sub offset
/// </summary>
public static UniversalTime operator -(UniversalTime date, TimeSpan offset)
{
var jd = SweDate.DateToJulianDay(date, DateCalendar.Gregorian);
jd -= offset.TotalDays;
return(SweDate.JulianDayToDate(jd, DateCalendar.Gregorian));
}
/// <summary>
/// New date from components
/// </summary>
public UniversalTime(int year, int month, int day, double hour)
: this()
{
var jd = SweDate.DateToJulianDay(year, month, day, hour, DateCalendar.Julian);
SweDate.JulianDayToDate(jd, DateCalendar.Julian, out _Year, out _Month, out _Day, out _Hours, out _Minutes, out _Seconds);
}
/// <summary>
/// Returns the DateUT of this Julian Day
/// </summary>
public UniversalTime ToDateUT()
{
return(SweDate.JulianDayToDate(Value, Calendar));
}
/// <summary>
/// Get Date UT from Ephemeris Time
/// </summary>
public UniversalTime DateUT(EphemerisTime et)
{
return(SweDate.JulianDayToDate(et.JulianDay.Value, et.JulianDay.Calendar));
}
/// <summary>
/// Get Date UT from Julian Day
/// </summary>
public UniversalTime DateUT(JulianDay jd)
{
return(SweDate.JulianDayToDate(jd.Value, jd.Calendar));
}